At what point does this go from plagiarism to creatively modifying another piece of art? For example, epic nation's logo is clever in that by rotation, it chan

At what point does this go from plagiarism to creatively modifying another piece of art? For example, epic nation's logo is clever in that by rotation, it changes the EZ logo to EN. Is that necessarily plagiarism? Isn't that more akin to a "remix"?